CN1226848C - Billibit Ethernet passive light network system and medium access control method - Google Patents
Billibit Ethernet passive light network system and medium access control method Download PDFInfo
- Publication number
- CN1226848C CN1226848C CNB021503648A CN02150364A CN1226848C CN 1226848 C CN1226848 C CN 1226848C CN B021503648 A CNB021503648 A CN B021503648A CN 02150364 A CN02150364 A CN 02150364A CN 1226848 C CN1226848 C CN 1226848C
- Authority
- CN
- China
- Prior art keywords
- onu
- frame
- window
- time slot
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0066—Provisions for optical burst or packet networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0064—Arbitration, scheduling or medium access control aspects
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Signal Processing (AREA)
- Computing Systems (AREA)
- Small-Scale Networks (AREA)
- Time-Division Multiplex Systems (AREA)
- Optical Communication System (AREA)
Abstract
A GE-PON (Gigabit Ethernet Passive Optical Network) system and media access control method for the same are disclosed. In the GE-PON system, by employing MAC attributes of the gigabit Ethernet frames, an OLT (Optical Line Termination) transmits a downstream window containing both a control frame having timeslot position and size information in association with at least two ONUs and Ethernet frames to an ODN (Optical Distribution Network). The OLT analyzes contents of RAUs in an upstream window transmitted from the ONUs in a TDMA method and received from the ODN, and permits timeslot position and size corresponding to each of the ONUs. A plurality of ONUs, connected to the ODN, have their respective timeslot position and size allocated in response to their respective information contained in the control frame of the downstream window. RAU frames are transmitted having queue information and Ethernet frames associated with the allocated timeslots. As a result, by the above MAC structure of the GE-PON system, the OLT can be quickly intercommunicated with a plurality of ONUs.
Description
Invention field
The present invention relates to EPON (PON) system, particularly GE-PON (Gigabit Ethernet frame EPON) system and media interviews thereof control (MAC) method.
Background technology
Usually, configuration PON system is so that it has passive splitter or WDM (wavelength division multiplexing) assembly of arranging between user capture node (as FTTH (Fiber to the home) or FTTC (Fiber To The Curb) and NT (network terminal) node).In such configuration, all nodes all are distributed in bus or the tree structure, thereby have formed overall topological structure.ATM (asynchronous transfer mode)-PON is a kind of known technology in this area as typical PON system, and (International Telecommunications Union-T) describes its MAC technology in G.983.1 in detail at ITU-T.
Authorize on November 2nd, 1999, the U.S. Patent No. 5 that is entitled as " agreement (PROTOCOL FOR DATA COMMUNICATION OVER APOINT-TO-MULTIPOINT PASSIVE OPTICAL NETWORK) of carrying out data communication through the point-to-multipoint EPON ", 978, on September 15th, 374 and 1999 is disclosed, be entitled as and described the MAC agreement of using in the conventional ATM PON system among the open No.1999-70901 of Korean Patent of " method (METHOD FOR IMPLEMENTINGASYNCHRONOUS PASSIVE OPTICAL NETWORK MEDIA ACCESSCONTROL PROTOCOL) of implementing asynchronous EPON medium access control protocol ", as a reference below with reference to them.Below the MAC of ATM-PON system will be described briefly.
Fig. 1 a～1b has explained the block diagram of the ATM-PON system that ITU-TG.983 recommends.ATM-PON system shown in Fig. 1 a or the 1b is positioned on the tree structure route and contains an OLT (Optical Line Termination (optical line terminal)) 10, and it is playing an important role when each user relevant with access network provides information.OLT10 has a tree topology structure and links to each other with ODN (Optical Distribution Network (optical distributed network)) 12.ODN12 distributes the downlink data frame that receives from the OLT10 shown in Fig. 1 a, and perhaps multiplexed uplink data frames sends to them the OLT10 shown in Fig. 1 b then.ODN12 and at least two ONU (OpticalNetwork Unit (optical network unit)) 14i (i=a wherein, b and c; And a, b represents natural number with c) link to each other.As shown in Figure 1a, the configuration of ONU14i can receive from the downlink data frame of ODN12 and with them and send to a plurality of user 16i (i=a wherein, b and c; And a, b and c represent natural number).Shown in Fig. 1 b, ONU14i uses the dateout from user 16i to send to ODN 12 as uplink data frames and with uplink data frames.It should be noted that in Fig. 1 a～1b digital 16i (that is, 16a is to 16c) represents the user, can also represent NT (Network Termination (network terminal)) or the various access network terminal units that can in PON, use.
Conventional ATM-PON system shown in Fig. 1 a～1b carries out uplink or downlink transfer with the form of Frame, and wherein each Frame has the ATM cell of the mutual variation of predetermined quantity.The size of each ATM cell is 53 bytes.In the tree type PON structure shown in Fig. 1 a～1b, the following row cell that OLT10 correctly will distribute to each ONU14i is inserted in the downlink frame.Under the situation of uplink, according to TDM (time division multiplexing) agreement, OLT10 obtains the visit to the data that send from ONU14i.In this case, be connected ODN12 between OLT10 and the ONU14i as passive device.OLT10 utilizes location algorithm (ranging algorithm) to connect the data that prevent among the ODN12 by pseudo range to conflict each other.In addition, send under the situation of downlink data to ONU14i at OLT10, encryption key and OAM (Operation, Administration and Maintenance (Operations, Administration and Maintenance)) message is exchanged between OLT10 and ONU14i in the mode that can guarantee the data security between OLT10 and the ONU14i.For this reason, up/downlink frame has and is used for the special purpose atm cell of message exchange or has corresponding data field in general ATM cell in being used at the fixed time at interval.
As mentioned above, the ATM-PON system is according to the ATM cell collocating uplink/downlink frame of predefine size, and carries out the MAC agreement because of the tree structure of putting multiple spot uses TDMA in uplink.Therefore, the bandwidth assignment algorithm of ONU becomes complicated.
Simultaneously, along with current technique of internet growth trend fast, increased the demand of high bandwidth more.Therefore, in order to adapt to transmission end to end, many manufacturers have utilized Gigabit Ethernet to substitute atm technology and have developed the PON system.Gigabit Ethernet has the bandwidth of relatively low production cost and broad, and atm technology has very high production cost and limited bandwidth, and needs the Internet protocol packets segmentation.
Alloptics company utilizes ethernet frame to substitute ATM in the PON of access network structure and the GE-PON system that realizes is a representative example.The GE-PON system that Alloptics makes is to the fixing 2ms time slot of each ONU allocated size.Like this because the time slot of distributing to each ONU is fixed-size predetermined value, so the GE-PON system simplification of Alloptics the bandwidth assignment algorithm.But, do not have up/during downlink data, the GE-PON system has the unfavorable aspect of waste bandwidth.
Therefore, be necessary the GE-PON system is improved to overcome defective of the prior art.
Summary of the invention
The present invention has overcome the problems referred to above and other advantage is provided by GE-PON system and the control method thereof that adopts the Gigabit Ethernet frame to be provided for to carry out the MAC agreement of PON.
According to an aspect of the present invention, provide a kind of MAC protocol method, be used for more effectively adopting the Gigabit Ethernet frame, and be provided for guaranteed qos (service quality), the field of OAM and encryption in the PON structure.
According to the embodiment of the invention, GE-PON system in a kind of PON system is provided, has ODN as optical splitter, it comprises: the OLT that links to each other with ODN, being used for (1) sends to ODN and comprises the two descending window of control frame with the time slot position related with at least two ONU and size information and ethernet frame, be used for (2) and analyze the content of the RAU (Request Access Unit (request addressed location)) of the up window that sends and receive from ODN from ONU according to the TDMA method, and be used for (3) and determine and each ONU time slot corresponding position and size.The ONU that a plurality of ODN of being connected to are arranged, be used for responding the control frame of descending window comprises they self information distributes they self time slot position and size, and be used for to/have the RAU frame and an ethernet frame of they self queuing message from time slot transmission/reception distribution.
In a preferred embodiment, ethernet frame has the Gigabit Ethernet frame, and descending window and up window have the size of 2ms respectively.
In a further advantageous embodiment, the control frame of descending window comprises the definite ID (sign) relevant with a plurality of ONU that are connected to ODN and the permission information of time slot position/size of being used for.
In another preferred embodiment, descending window comprises a plurality of OAM frames that insert at interval with rule.These a plurality of OAM frames comprise information relevant with OAM and the range finding control information relevant with the ONU that is connected ODN.Like this, be inserted into then in that the OAM frame is divided into many sections, and the group that all ONU is divided into predetermined quantity shares under the situation of an OAM frame to allow ONU, can make operation time delay minimum.
Description of drawings
By can more being expressly understood advantage of the present invention and characteristic below in conjunction with the accompanying drawing detailed description of the present invention.
Fig. 1 a and 1b explain the block diagram that adopts ITU-T to recommend ATM-PON system G.983;
Fig. 2 a and 2b are the block diagrams of explaining GE-PON system according to a preferred embodiment of the invention;
Fig. 3 is the schematic diagram of explaining according to Gigabit Ethernet frame structure of the present invention;
Fig. 4 is the schematic diagram of descending windowed format in the GE-PON system of explaining according to a preferred embodiment of the invention;
Fig. 5 is the schematic diagram of up windowed format in the GE-PON system of explaining according to a preferred embodiment of the invention;
Fig. 6 is a schematic diagram of explaining up/down channel transmission structure according to a preferred embodiment of the invention; And
Fig. 7 is a schematic diagram of explaining according to a preferred embodiment of the invention the bandwidth assignment of being carried out by mirror image counter and request counter.
Embodiment
Now, describe the preferred embodiments of the present invention in conjunction with the accompanying drawings in detail.In the accompanying drawings, even same or analogous parts are presented among the different figure, also represent with identical reference number.For clear and for simplicity, for known function that is incorporated herein and configuration, because of it can make theme of the present invention unintelligible, so will ignore detailed description to them.
Fig. 2 a and 2b are the block diagrams of explaining GE-PON system according to a preferred embodiment of the invention.With reference to figure 2a and 2b, OLT100, by the ODN102 that the optical splitter as passive component constitutes, a plurality of ONU104i (wherein, i=a, b and c; And a, b and c represent natural number), and the syndeton between them is similar with the counter element shown in the 1b to Fig. 1 a.GE-PON system shown in Fig. 2 a or the 2b comprises an OLT as intermediate toll centre, a plurality of user 106i (wherein, i=a, b and c; And a, b and c represent natural number), and a plurality of ONU104i.Should be appreciated that the quantity of ONU can be determined by considering appropriate bandwidth assignment and predetermined optical power budget.If necessary, ONU104i can be installed in the distribution box in building or apartment, and the various services such as ADSL perhaps are provided in the porch of residential block.OLT100 receives data from the backbone network (not shown), to each ONU104i distribute data, perhaps obtains visit to data according to the TDM method from ONU104i by ODN102.For this purpose, OLT100 carries out handoff functionality to the 2nd layer MAC Address at least, and should design IP (Internet protocol) exchange/router feature that ONU104i carries out layers 2 and 3.
The various functions and the operation of the GE-PON system shown in Fig. 2 a and the 2b are described below.A function of GE-PON system is that the bandwidth assignment with each ONU104i is maintained in predeterminated level, to guarantee the QoS of up/downlink data in the PON structure.Another function of GE-PON system provides and is used to carry out various additional functions, as encrypting the MAC structure of OAM(Operation Administration Maintenance) and distance measurement function.Encryption can prevent adjacent ONU104j (wherein, j=a, b and c; A, b and c=natural number; And i γ j) read the broadcasts downstream data of the predetermined ONU104i adjacent with contiguous ONU104j.When receiving physical error in communication, OAM(Operation Administration Maintenance) allows physical error and OLT100 and ONU104i to exchange.Because the pseudo range between OLT100 and each ONU104i can be variable after data are by ODN12, so distance measurement function constantly determine/is safeguarded the pseudo range between OLT100 and the ONU104i, to prevent at the data collision between ODN102 under the situation of uplink.Need offer this MAC structure of utilizing ethernet frame in conjunction with the form of ethernet frame with the predetermined window form, describe MAC protocol architecture below in detail according to this form.
Fig. 3 is the schematic diagram of explaining according to standard Gigabit Ethernet frame structure of the present invention.With reference to figure 3, the Gigabit Ethernet frame comprises by play the preamble that specific bit stream is used for 7 bytes of frame synchronization or physically stable in frame start-up portion front, by playing the SFD (Start Frame Delimiter) of 1 byte that is used for representing the frame start-up portion of specific format bit stream, the target hardware address and the source hardware address that have 6 bytes respectively, the LDF/TYP (length of data field) of 2 bytes of expression data-field length, variable data field (being expressed as LLC DATA) in 0 to 1500 bytes range, the filling field of using when being used for size of data when data field (PAD), and the CRC of 4 bytes (cyclic redundancy check) field less than minimum frame size.Describe above-mentioned Gigabit Ethernet frame among the IEEE 802.3z in detail.
Fig. 4 is explanation sends to the descending windowed format of ONU104i from OLT100 in the GE-PON system according to the preferred embodiment of the present invention a schematic diagram.With reference to figure 4, the length of the descending window that sends from OLT100 is fixed as 2ms.The reason of forming the descending window of 2ms by variable Gigabit Ethernet frame is that descending length of window is more little, and the occupancy of the overhead of comparing with descending length of window is just high more.On the contrary, descending length of window is long more, and the time interval of visiting each ONU104i is just long more, so just can not carry out QoS and OAM(Operation Administration Maintenance).Therefore, the descending window of 2ms is called as compromise length.
As shown in Figure 4, in descending window, insert and allow control frame, so that to the time slot and the time slot size that allow the control frame distribution from the up TDMA transmission of each ONU104i.Because ethernet frame has variable-length, therefore distribute to the length overall of the time slot of each ONU104i and in 8 byte units, distribute changeably.Under the situation that the traffic loads that ONU104i needs differs from one another, fixing time slot allocation causes the frequency band waste, and therefore above-mentioned variable slot distributes provides the most effective frequency band management.In addition, four the OAM frames (OAM# 1 is to OAM# 4 among Fig. 4) that respectively comprise minimum ethernet frame (that is 64 bytes) are inserted into descending window with predetermined time interval.Each OAM frame comprises an ONU ID who is used for representing ONU104i, is used for the encryption key of data encryption, the plug-and-play feature of ONU104i, various alarm signals, and the message field that is used for distance measurement function.
Fig. 5 is a schematic diagram of explaining the up windowed format in the GE-PON system according to the preferred embodiment of the invention.Especially, Fig. 5 described when according to TDMA method data from the up window structure of ONU104i when the time slot of distributing to ethernet frame and RAU (request addressed location) send data.With reference to figure 5, each ONU104i is inserted into the RAU that is made up of minimum ethernet frame (that is, 64 bytes) in the up window, then they is sent to OLT 100.Each RAU comprises title, and the queuing message QL of ONU104i is used for the business information of bandwidth assignment, is used for responding the content of descending OAM frame, and is used to insert the message field that sends required information.
Fig. 6 is a schematic diagram of explaining up according to the preferred embodiment of the invention/descending transmission structure.In more detail, Fig. 6 has explained the transmission/accepting state of data between OLT 100 and three ONU104i.Referring to Fig. 6, reference symbol " G " representative comprises and an ID that ONU104i is relevant the authorization messages of time slot and time slot size.Reference symbol " R " representative comprises the RAU of queue length information and the service priority information of ONU104i.The user data that reference symbol " DATA " representative is made up of OAM frame and user data.
Fig. 7 explains according to the bandwidth assignment schematic diagram of the preferred embodiment of the present invention by mirror image counter and request counter.In more detail, if Fig. 7 explained each ONU104i and can only send a Gigabit Ethernet frame in one-period, how by adopting permission information from the descending window of OLT100 broadcasting and the queuing message of the ONU104i on the RAU to distribute time slot and how to send data.
The action required of the preferred embodiment of the present invention is described below with reference to Fig. 2 a to 7.
In operation, the OLT100 of the GE-PON system shown in Fig. 2 a or the 2b is by the descending window of the every 2ms of ODN102 in ONU104i BROADCASTING GRAPH 4.As shown in Figure 4, allow control frame to be positioned at the beginning of descending window.Allow control frame to comprise title, each ONU104i that in tree structure, links to each other with ODN102 (that is) id information, 32 ONU, and be allowed in the time slot of each ethernet frame of up window transmission and the information of time slot size.The position and the size of the corresponding time slot of information that " permission " ONU is required.5 bytes of this informational needs.Therefore, for managing 32 ONU, allow the size of control information to calculate according to " title+(32*5 byte)+overhead ".Obtaining like this allowing the size of control frame is 178 bytes.
In descending window shown in Figure 4, the relevant message (being described as RANGING FIELD (range finding field)) with range finding of message relevant with OAM (be described as " OAMMESSAGE FIELD (OAM message field)) and OLT100 is loaded on the OAM frame of being made up of minimum ethernet frame (that is 64 bytes) (being OAM# 4).The OAM frame is sent to a plurality of ONU104i.The OAM frame is divided into 4 OAM frame sections (hereinafter referred to as 4 OAM frames, representing to #4 with OAM#1), then 4 OAM frames is inserted in the descending window of 2ms to prevent that the time interval between the OAM frame from becoming oversize.In other words, the priority message in the current OAM frame of OLT100 is loaded into next OAM frame adjacent with current OAM frame in 4 OAM frames, has reduced the time elongatedness when message sends like this.Each of 4 OAM frames is relevant and carry out and relevant plug-and-play feature and the distance measurement function of 8 ONU104i (that is, 32 ONU104i) altogether in information and the descending window message.The reason of inserting PAD at the back segment of descending window is the changeability of ethernet frame or sends the situation that empty business can cause the lack of fill of 2ms length of window.Descending window structure shown in Figure 4 can comprise IFG (interframe gap), preamble, and each is 160 Gigabit Ethernet frames of 1518 bytes.Under the situation of speech data, but the permissible delay of the maximum 2ms that causes except the fixed size of up/descending window, speech data is sent to ONU104i does not have other problem.
Therefore, the descending window shown in Fig. 4 sends each that the Gigabit Ethernet frame data is sent to 32 ONU104i being connected with ODN102 in the tree structure, allows time slot position and slot length about each ONU104i simultaneously.
Below with reference to the up window structure shown in Fig. 5.According to the permission control frame that receives from OLT100, the up Gigabit Ethernet frame of each ONU104i is inserted into the time slot that they allow self.Identical with descending send mode, allow information under the situation of an ONU104i in all up transmissions, 160 ethernet frames that respectively have 1518 bytes can be included in the up window structure.
In the up window situation of routine, even each ONU104i that links to each other with conventional PON system is designed to be not used in the frame of the up transmission of ONU104i in up window, the mode of also at least one RAU frame being inserted in the up window is distributed time slot from the permission control frame of descending window interior.The reason of ONU104i being carried out above-mentioned design is to prepare next up transmission by continuous notice OLT100 about the transmit queue information of ONU104i and the message of relevant OAM, and notice OLT100 is about the state of ONU104i.
Should point out, according to a preferred embodiment of the invention, omitted the required permission process of ONU104i quene state that sends in the GE-PON system shown in Fig. 2 a or the 2b, thereby the problem of the frequency band waste that the ATM-PON that has improved the ITU-TG.983.1 recommendation produces, among the ATM-PON that ITU-TG.983.1 recommends, the queue state information of ATM-PON inquiry/inspection ONU104i sends the permission information that is used for up transmission then.
According to foregoing process, up/descending maximum transmission capacity of an ONU104i is 960Kbps, and up/descending capacity that sends guarantees at 30Mbps 32 ONU104i the time.The overhead ratio that is arranged in up/descending window of 2ms is approximately 4%.If control 16 ONU104i, 16 ONU104i can allow the transmission capacity of about 60Mbps so.Below with reference to Fig. 6 this operation is described.
With reference to figure 6, each ONU104i waits for its time slot according to the distribution content G that allows control frame from the descending window of OLT100 broadcasting.Each ONU104i inserts in up window and sends message R and data then.
The bandwidth assignment of time slot can change according to the transmission/reception of the descending/up window shown in the Figure 4 and 5.Describe bandwidth assignment in detail below with reference to Fig. 7.
Fig. 7 has explained by adopting from OLT100 and has been broadcast to permission information on the descending window of ONU104i and how the queuing message of the ONU104i on the RAU distributes time slot and how to send data.In order to reach this purpose, OLT100 comprises MC107 relevant with each ONU104i (mirror image counter) and RC108 (request counter) (two all are presented among Fig. 2 a and the 2b).OLT100 distributes the batch operation of time slot size unconditionally to depend on MC corresponding with each ONU104i and RC in the up transmission of each ONU104i.When the in fact up transmission of Gigabit Ethernet frame, the MC among the OLT100 is to the quantity and their the length counting of Gigabit Ethernet frame.The number count of the permission solicited status that writes down among the RAU of the RC among the OLT100 to up transmission.The result is that when receiving the output signal of MC and two counters of RC, OLT100 correctly carries out the processing about the up transmission enable state that allows request.To be described in detail below.
With reference to figure 7, when the Gigabit Ethernet frame arrived ONU104i, the queue value QL among the ONU104i increased, but then reduced when ethernet frame is up transmission.Be set to as the transmit queue value QL in ONU104i under the situation of descending window that OLT100 broadcasting under the condition of " 2 " has above-mentioned permission control frame, when the RAU frame loaded transmit queue information " 2+ " and OAM information in the distributed time slot position, ONU104i was to the up transmission of OLT100 RAU frame.In this case, because the permission solicited status that comprises in the RAU frame of queue length and up transmission is set to " 2+ " respectively, so be set to " 2 " respectively corresponding to MC and the RC of the ONU104i among the OLT100.
Allow at OLT100 under the situation of above-mentioned up transmission by ethernet frame data (sending to corresponding ONU104i by descending window) and this permission control frame, the value of RC is reduced to " 1 ".Allow once more in next cycle under the situation of up transmission, the value of RC is reduced to " 0 ".Under the situation of the up transmission in the distributed time slot position of ONU104i, reduce MC value among the OLT100 and the queue length QL among the ONU104i at ONU104i corresponding to the transmit queue value QL of Gigabit Ethernet frame that allows slot length and ONU104i.
By adopting method shown in Figure 7 to send ethernet frame between OLT100 and ONU104i, the MAC agreement in the PON system can be simpler.In other words, even when ONU sends RAU, exemplary systems also needs the permission of OLT, but the present invention has reduced this permission step effectively to improve system effectiveness.To describe in detail below.
In the queue memory of ONU104i, add up and want a plurality of data of the up OLT100 of sending to.ONU104i need be to OLT100 notice data accumulated amount and urgency in queue memory.Therefore, ONU104i also has the RAU frame except the conventional data frame, and by the RAU frame, the information in the queue memory is loaded into OLT100.According to this information, OLT100 will have the permission control frame downlink broadcast of permission information to ONU104i.Allow control frame to represent priority and sendout (that is, time slot position and size (or frequency band)) that upstream data sends.
Request in ONU104i is compared under the too big situation with the uplink data sending of reality, and OLT100 considers all conditions.Cause that the frequency band of another ONU104i occupies if corresponding ONU104i needs more multiband distribution or bandwidth assignment condition to reduce, consider that so the precedence information of business can be abandoned the up permission relevant with the business with low priority.The bandwidth assignment of ONU104i will greatly depend on following PON system, as realizing a plan of ISP, therefore should consider various particular cases according to the characteristics of access network.
According to the invention provides of the embodiment of above-mentioned proposition to provide the bandwidth mode that is higher than ATM-PON to send the MAC structure of Gigabit Ethernet transmission effectively in the PON structure that is used for access network.In addition, the present invention is divided into ATM cell with an IP and has reduced the required amount of overhead of reorganization IP grouping, forms more effective access network like this.
As what foregoing description manifested, the present invention includes the permission control frame of downlink broadcast, OAM and RAU etc., because they have the mac frame attribute of the Gigabit Ethernet of standard, therefore in this way, it can with current typical Gigabit Ethernet controller and some physical layer control chip compatibilities with commercial mass production.In a word, the present invention has reduced exploitation redaction required production cost and the time cycle of chip, and can be as the substitute of expensive atm device.
Though the embodiment that the present invention who is disclosed proposes is for the purpose of explaining, under the situation of the scope and spirit that do not break away from claims of the present invention, can carry out various modifications, increase and replacement.
Claims (12)
1. Gigabit Ethernet EPON (GE-PON) system in an EPON (PON) system comprises:
The optical line terminal that links to each other with ODN (OLT), be used for sending and comprise the two descending window of control frame with the time slot position related and size information and ethernet frame with at least two optical network units (ONU) to ODN, analysis is according to the content of time division multiple access (TDMA) method from optical network unit (ONU) transmission and the request addressed location (RAU) from the up window that ODN receives, and the time slot position and the size that allow corresponding each ONU; And
At least two ONU that are connected with ODN, can respond their the corresponding information that comprises in the control frame of descending window and distribute their corresponding time slot position and sizes, and to/a RAU frame of their corresponding queuing messages and ethernet frame had from distributed time slot transmission/reception.
2. GE-PON according to claim 1 system is characterized in that descending window comprises at least two Gigabit Ethernet frames.
3. GE-PON according to claim 2 system, the control frame that it is characterized in that descending window comprises and is used for determining the sign (ID) relevant with the ONU of ODN connection and the permission information of time slot position/size.
4. GE-PON according to claim 3 system, it is characterized in that descending window comprises a plurality of operations of inserting at interval with rule, administers and maintains (OAM) frame, these a plurality of OAM frames comprise information relevant with OAM and the range finding control information relevant with the ONU that is connected ODN.
5. GE-PON according to claim 3 system, the control frame that it is characterized in that descending window comprises time slot size relevant with each ONU and the time slot position information in the up window in 5 bytes, inserted in the mode of the permission up transmission relevant with 32 ONU then.
6. GE-PON according to claim 2 system, it is characterized in that the ethernet frame that has minimum dimension in the ethernet frame of RAU frame by the various sizes scope in the up window forms, and each ONU is inserted into up window by the permission control frame in the descending window with RAU.
7. GE-PON according to claim 3 system, it is characterized in that descending window comprises at least 4 OAM frames that insert by predetermined space, and all ONU are grouped into the group of predetermined quantity, so that OUN can share an OAM frame, each OAM frame comprises information relevant with OAM and ranging information.
8. according to any described GE-PON in the claim 1 to 7, it is characterized in that OLT comprises:
The mirror image counter is used for quantity and their big subtotal figures to the Gigabit Ethernet frame of each and the up transmission that respond a plurality of ONU; And
Request counter is used for the ethernet frame Count of Status to the ONU transmit queue that sends through the RAU of up transmission frame,
Wherein time slot position relevant with each ONU and time slot size are distributed to and corresponding corresponding mirror image Counter Value and the request counter value of ONU.
9. one kind is used at the OLT that has comprised the toll center effect, at least one ONU and be connected OLT and ONU between the GE-PON system of ODN in the method for control MAC, comprise step:
A) by OLT broadcast downstream window, descending window comprise be used for information be loaded into the ethernet frame relevant with a plurality of ONU that will in up window, send time slot position and the size permission control frame and a plurality of Gigabit Ethernet frame that will be broadcast to these a plurality of ONU; And
B) information of the permission control frame by analyzing the broadcast downstream window is distributed to ONU with time slot position in the up window and size, and, make a plurality of ONU send RAU frame by the time slot position of enough TDMA methods in up window with their own corresponding transmit queue states according to institute's distributed time slot size.
10. method according to claim 9 is characterized in that the permission control frame of descending window comprises the time slot size relevant with the up transmission of each ONU and the time slot position information of up window interior in 5 bytes, then it is inserted into descending window.
11. method according to claim 9, it is characterized in that descending window comprises at least 4 OAM frames that insert by predetermined space, all ONU are grouped into the group of predetermined quantity, make ONU can share an OAM frame, each OAM frame comprises and is used for information encrypted between ONU, be used to move/manage/safeguard the OAM information of ONU, and ranging information.
12. method according to claim 9 is characterized in that the ethernet frame that has minimum dimension from the ethernet frame of RAU frame by the various sizes scope of the up transmission of each ONU forms, and must be inserted into up window, sends then.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020010069987A KR100547722B1 (en) | 2001-11-10 | 2001-11-10 | Gigabit ethernet passive optical network system and method for media access control thereof |
| KR69987/2001 | 2001-11-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1417982A CN1417982A (en) | 2003-05-14 |
| CN1226848C true CN1226848C (en) | 2005-11-09 |
Family
ID=19715887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021503648A Expired - Fee Related CN1226848C (en) | 2001-11-10 | 2002-11-11 | Billibit Ethernet passive light network system and medium access control method |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7408955B2 (en) |
| EP (1) | EP1311137B1 (en) |
| JP (1) | JP3788779B2 (en) |
| KR (1) | KR100547722B1 (en) |
| CN (1) | CN1226848C (en) |
Families Citing this family (71)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3914036B2 (en) * | 2001-11-19 | 2007-05-16 | 富士通株式会社 | PON communication master and slave units |
| KR100421151B1 (en) * | 2002-01-17 | 2004-03-04 | 삼성전자주식회사 | Method for implementation procedure in giga bit ethernet passive optical network and ethernet frame structure thereof |
| KR100651364B1 (en) * | 2002-03-11 | 2006-11-28 | 삼성전자주식회사 | Method for allocating the transmission bandwidth in gigabit ethernet passive optical network |
| KR20030079311A (en) * | 2002-04-03 | 2003-10-10 | 삼성전자주식회사 | Method for point-to-point emulation n gigabit ethernet passive optical network |
| US7941559B2 (en) * | 2002-04-23 | 2011-05-10 | Tellabs Bedford, Inc. | Media access control address translation for a fiber to the home system |
| US20030210703A1 (en) * | 2002-05-13 | 2003-11-13 | Accton Technology Corporation | Method of managing frame and switch and network structure thereof |
| KR100606102B1 (en) * | 2002-08-03 | 2006-07-28 | 삼성전자주식회사 | Broadcast/communication unified passive optical network system |
| KR100456675B1 (en) * | 2002-11-26 | 2004-11-10 | 한국전자통신연구원 | Method of Ethernet data frame processing in Ethernet-PON MAC sublayer, and apparatus thereof |
| EP1434397B1 (en) * | 2002-12-24 | 2012-08-01 | Electronics and Telecommunications Research Institute | Scheduling in an Ethernet-based optical network |
| US7385995B2 (en) * | 2003-01-13 | 2008-06-10 | Brooktree Broadband Holding, Inc. | System and method for dynamic bandwidth allocation on PONs |
| US8958697B2 (en) | 2003-06-10 | 2015-02-17 | Alexander I. Soto | System and method for optical layer management in optical modules and remote control of optical modules |
| WO2005019970A2 (en) * | 2003-07-03 | 2005-03-03 | Ubi Systems, Inc. | Communication system and method for an optical local area network |
| CN100461654C (en) * | 2003-12-12 | 2009-02-11 | 武汉华工飞腾光子科技有限公司 | Ethernet passive optical network based on Wavelength Division Multiple Access and data transmission method thereof |
| KR101001515B1 (en) * | 2003-12-12 | 2010-12-14 | 주식회사 케이티 | Media access control method for weighted fairness guarantee scheduling in ethernet passive optical network |
| KR100523490B1 (en) | 2003-12-17 | 2005-10-24 | 한국전자통신연구원 | Method for multicast service in ethernet passive optical network system |
| KR100547828B1 (en) * | 2003-12-18 | 2006-01-31 | 삼성전자주식회사 | Gigabit Ethernet-based passive optical subscriber network and its method for more accurate detection of data errors for secure data transmission |
| KR100617684B1 (en) * | 2004-01-30 | 2006-08-28 | 삼성전자주식회사 | method for transmitting and receiving of ethernet data in broadcasting and communication convergence system |
| KR100557145B1 (en) * | 2004-02-03 | 2006-03-03 | 삼성전자주식회사 | FTTH System for Intergrationg Broadcasting and Communication By Using IEEE1394 |
| JP4490166B2 (en) * | 2004-05-19 | 2010-06-23 | 三菱電機株式会社 | Station side equipment |
| JP4490182B2 (en) * | 2004-06-17 | 2010-06-23 | 三菱電機株式会社 | Communication apparatus and packet communication method |
| MY142236A (en) * | 2004-07-14 | 2010-11-15 | Qualcomm Inc | A method and apparatus for delivering keys |
| US20060018322A1 (en) * | 2004-07-21 | 2006-01-26 | Moshe Oron | Dedicated service class for voice traffic |
| ATE389984T1 (en) * | 2004-12-13 | 2008-04-15 | Alcatel Lucent | PROTOCOL CONFIGURATION PROCEDURES |
| WO2006073284A1 (en) * | 2005-01-07 | 2006-07-13 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting/receiving multiuser packet in a mobile communication system |
| KR100735336B1 (en) * | 2005-02-16 | 2007-07-04 | 삼성전자주식회사 | The dynamic and propotional rate limiting scheme using OLT scheduling algorithm |
| FR2882599B1 (en) * | 2005-02-25 | 2007-05-04 | Somfy Soc Par Actions Simplifi | COMMUNICATION SYSTEM WITH CROSS ACCOUNTING AND ASSOCIATED COMMUNICATION FRAME |
| CN1319329C (en) * | 2005-06-23 | 2007-05-30 | 烽火通信科技股份有限公司 | Automatic method for reporting MAC address from device of optical network unit at remote side to network management system |
| JP3936721B2 (en) * | 2005-07-29 | 2007-06-27 | 株式会社日立コミュニケーションテクノロジー | Optical access system, optical subscriber unit and optical concentrator |
| EP1958394A2 (en) * | 2005-12-02 | 2008-08-20 | Koninklijke Philips Electronics N.V. | Wireless systems and methods including cooperative communication medium access control |
| EP1982482A4 (en) * | 2006-01-19 | 2013-09-18 | Allied Telesis Holdings Kk | Ip triple play over gigabit ethernet passive optical network |
| CN101009584B (en) * | 2006-01-24 | 2011-04-20 | 华为技术有限公司 | Method, device and system for speed upgrade of the passive optical network |
| CN101048010B (en) * | 2006-03-31 | 2013-02-27 | 株式会社日立制作所 | Method and device for implementing memory function in passive optical network system |
| KR100774530B1 (en) * | 2006-06-28 | 2007-11-08 | 주식회사 크로스웍스 | Apparatus for media access control of gigabit ethernet passive optical network |
| US7873039B2 (en) | 2006-06-29 | 2011-01-18 | Broadlight Ltd. | Enhanced optical line terminal controller |
| CN101136703B (en) * | 2006-09-01 | 2011-04-20 | 华为技术有限公司 | Data transmission method, system and device |
| CN1946242B (en) * | 2006-10-19 | 2010-09-22 | 华为技术有限公司 | Method and device for supporting TDM service in light connected network |
| KR100813897B1 (en) * | 2006-11-07 | 2008-03-18 | 한국과학기술원 | Method and network architecture for upgrading legacy passive optical network to wavelength division multiplexing passive optical network based next-generation passive optical network |
| JP4410792B2 (en) * | 2006-12-21 | 2010-02-03 | 株式会社日立コミュニケーションテクノロジー | Encryption device |
| CN101282177B (en) * | 2007-04-06 | 2010-11-03 | 杭州华三通信技术有限公司 | Data transmission method and terminal |
| JP4820791B2 (en) * | 2007-09-21 | 2011-11-24 | 株式会社日立製作所 | Passive optical network system and ranging method |
| CN101442374B (en) * | 2007-11-20 | 2012-12-12 | 财团法人工业技术研究院 | TDM optical network system, device and method for preventing signal collision |
| CN101478473B (en) * | 2008-01-02 | 2011-05-11 | 中兴通讯股份有限公司 | MAC uplink scheduling method and apparatus used for GPON OLT |
| US20090263122A1 (en) * | 2008-04-22 | 2009-10-22 | Roger Jonathan Helkey | Method and apparatus for network diagnostics in a passive optical network |
| CN101610239B (en) * | 2008-06-20 | 2012-10-03 | 上海未来宽带技术及应用工程研究中心有限公司 | Device and method for realizing in-band OMA between OLT and ONUs in GEPON |
| EP2159937B1 (en) * | 2008-09-02 | 2014-05-14 | Mitsubishi Electric R&D Centre Europe B.V. | Method for coordinating an uplink TDMA access shared by several sub-networks of a Passive Optical Network (PON) |
| CN101729358B (en) * | 2008-10-31 | 2012-04-04 | 华为技术有限公司 | Method, system and device for transferring and receiving information |
| CN101877670B (en) * | 2009-04-29 | 2012-11-21 | 邱荣楠 | Time-division multiple access method of optical fiber network media and traffic control mode applied to same |
| CN101540933B (en) * | 2009-04-30 | 2012-04-25 | 殷爱菡 | Programmable dynamic bandwidth distribution method and device |
| JP4921571B2 (en) * | 2010-02-12 | 2012-04-25 | 三菱電機株式会社 | Communication device, PON system, parent device, child device, and packet communication method |
| TWI407729B (en) * | 2010-03-01 | 2013-09-01 | Rong Nan Chiou | Bus-type optical fiber network system |
| US8976680B2 (en) * | 2010-03-15 | 2015-03-10 | Juniper Networks, Inc. | Operations, administration, and management fields for packet transport |
| CN101783980B (en) * | 2010-03-15 | 2014-06-11 | 中兴通讯股份有限公司 | Optical transmission device and passive optical network system |
| US9185555B2 (en) * | 2010-04-22 | 2015-11-10 | Futurewei Technologies, Inc. | Method for authentication of a wireless backup system for an optical network unit |
| EP2487833B1 (en) * | 2011-02-09 | 2018-07-04 | Mitsubishi Electric R&D Centre Europe B.V. | Optimized dynamic bandwidth scheduler |
| CN102142897B (en) * | 2011-03-29 | 2014-08-20 | 华为技术有限公司 | Detection method and device of ONU (optical network unit) as well as passive optical network system |
| EP2737645B1 (en) * | 2011-07-27 | 2015-09-02 | Telefonaktiebolaget L M Ericsson (Publ) | Energy efficient dynamic bandwidth allocation for optical networks |
| JP5857388B2 (en) * | 2011-09-12 | 2016-02-10 | 富士通株式会社 | Transmission apparatus and transmission method |
| US8873958B2 (en) * | 2011-09-27 | 2014-10-28 | Nec Laboratories America, Inc. | Sleep control for energy efficiency in ethernet passive optical networks |
| US9312941B2 (en) | 2011-10-14 | 2016-04-12 | Qualcomm Incorporated | Base stations and methods for facilitating dynamic simulcasting and de-simulcasting in a distributed antenna system |
| US9276685B2 (en) * | 2011-10-14 | 2016-03-01 | Qualcomm Incorporated | Distributed antenna systems and methods of wireless communications for facilitating simulcasting and de-simulcasting of downlink transmissions |
| JP5661665B2 (en) * | 2012-02-22 | 2015-01-28 | 日本電信電話株式会社 | Branched optical access system and method |
| JP5661664B2 (en) * | 2012-02-22 | 2015-01-28 | 日本電信電話株式会社 | Branched optical access system and method |
| US8873565B2 (en) | 2012-04-16 | 2014-10-28 | Futurewei Technologies, Inc. | Method and apparatus of delivering upstream data in ethernet passive optical network over coaxial network |
| JP6490005B2 (en) | 2012-06-21 | 2019-03-27 | 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． | Variable optical filter, variable optical component, and multi-wavelength passive optical network system |
| US9253554B2 (en) | 2012-09-17 | 2016-02-02 | Broadcom Corporation | Time to time-frequency mapping and demapping for ethernet passive optical network over coax (EPoC) |
| WO2014047787A1 (en) * | 2012-09-25 | 2014-04-03 | 华为技术有限公司 | Method, device and system for continuous window sending |
| KR101621400B1 (en) * | 2013-12-20 | 2016-05-16 | 주식회사 쏠리드 | An optical repeating system and a method of setting up identification information of a remote device therein |
| KR101846469B1 (en) * | 2017-09-05 | 2018-04-09 | (주)자람테크놀로지 | Transimpedance amplifier reset apparatus for low power passive optical network equipment and method thereof |
| CN111224760B (en) * | 2018-11-26 | 2022-10-25 | 中国电信股份有限公司 | Management information transmission method and device |
| CN114520938A (en) * | 2020-11-20 | 2022-05-20 | 华为技术有限公司 | Data transmission method and related equipment |
| CN112887851B (en) * | 2021-01-13 | 2021-10-08 | 烽火通信科技股份有限公司 | Household all-optical network system and implementation method thereof |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2880927B2 (en) * | 1995-03-17 | 1999-04-12 | 日本電気株式会社 | Optical fiber network system |
| US5864413A (en) * | 1996-02-23 | 1999-01-26 | Lucent Technologies, Inc. | Passive optical network for dense WDM downstream data transmission and upstream data transmission |
| GB9700930D0 (en) | 1997-01-17 | 1997-03-05 | Northern Telecom Ltd | Distribution network |
| GB9704587D0 (en) * | 1997-03-05 | 1997-04-23 | Fujitsu Ltd | Wavelength-division multiplexing in passive optical networks |
| US5978374A (en) * | 1997-04-03 | 1999-11-02 | Ericsson, Inc. | Protocol for data communication over a point-to-multipoint passive optical network |
| CA2295563C (en) * | 1997-07-11 | 2002-04-30 | Telcordia Technologies, Inc. | Method and apparatus for controlling communications in a passive optical network |
| KR100260251B1 (en) * | 1998-02-25 | 2000-07-01 | 이계철 | Atmpon mac protocol |
| JP3226163B2 (en) | 1998-09-17 | 2001-11-05 | 日本電気株式会社 | Communication system using time division multiple access system |
| JP2000196646A (en) * | 1998-12-28 | 2000-07-14 | Fujitsu Ltd | Band allocating method and band allocation transmission system |
| US6778550B1 (en) * | 2000-02-29 | 2004-08-17 | Lucent Technologies Inc. | Method and apparatus for TDM/TDMA communications |
| KR20020033362A (en) * | 2000-10-31 | 2002-05-06 | 오길록 | MAC Protocol Over An ATM Passive Optical Network |
| US7031343B1 (en) * | 2000-11-17 | 2006-04-18 | Alloptic, Inc. | Point-to-multipoint passive optical network that utilizes variable-length packets |
| US6546014B1 (en) | 2001-01-12 | 2003-04-08 | Alloptic, Inc. | Method and system for dynamic bandwidth allocation in an optical access network |
-
2001
- 2001-11-10 KR KR1020010069987A patent/KR100547722B1/en not_active IP Right Cessation
-
2002
- 2002-10-23 US US10/278,305 patent/US7408955B2/en not_active Expired - Fee Related
- 2002-11-07 EP EP02024966A patent/EP1311137B1/en not_active Expired - Fee Related
- 2002-11-11 CN CNB021503648A patent/CN1226848C/en not_active Expired - Fee Related
- 2002-11-11 JP JP2002327320A patent/JP3788779B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1311137A2 (en) | 2003-05-14 |
| JP3788779B2 (en) | 2006-06-21 |
| KR20030038266A (en) | 2003-05-16 |
| CN1417982A (en) | 2003-05-14 |
| US7408955B2 (en) | 2008-08-05 |
| KR100547722B1 (en) | 2006-02-01 |
| JP2003283521A (en) | 2003-10-03 |
| EP1311137B1 (en) | 2012-03-28 |
| US20030091045A1 (en) | 2003-05-15 |
| EP1311137A3 (en) | 2006-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1226848C (en) | Billibit Ethernet passive light network system and medium access control method | |
| US7257326B2 (en) | Method for allocating bandwidth for voice service in a Gigabit Ethernet passive optical network | |
| Choi et al. | Dynamic bandwidth allocation algorithm for multimedia services over Ethernet PONs | |
| KR100421151B1 (en) | Method for implementation procedure in giga bit ethernet passive optical network and ethernet frame structure thereof | |
| US8027586B2 (en) | Passive optical network system and optical line terminating apparatus | |
| EP2348691B1 (en) | Service transmission method and service transmission apparatus | |
| US7437076B2 (en) | Data transmission method in gigabit ethernet passive optical network | |
| JP2004529523A (en) | Point-to-multipoint passive optical network using variable length packets | |
| US8040918B2 (en) | Dynamic bandwidth allocation in a passive optical access network | |
| KR100566294B1 (en) | Dynamic bandwidth allocation method for gigabit ethernet passive optical network | |
| US20150195039A1 (en) | System and method for interchanging data in a hybrid ethernet-based passive optical network | |
| CN102427567B (en) | Asynchronous multi-wavelength mesh network adaptive node system based on optical packet switching | |
| JP2004289780A (en) | Optical subscriber's line terminal station device, optical subscriber's line termination apparatus and band assignment method to be used thereby | |
| Xiao et al. | An efficient reservation MAC protocol with preallocation for high-speed WDM passive optical networks | |
| Mastrodonato et al. | Analysis of a bandwidth allocation protocol for Ethernet passive optical networks (EPONs) | |
| Choi | Performance analysis of a bandwidth guaranteed medium access control protocol for WDM local networks | |
| KR100584354B1 (en) | Passive optical network system based on ieee 1394 | |
| Hossain | Next-generation self healing broadband access PON architectures for supporting triple play services & private networking capability | |
| Chen et al. | Adaptive DBA: an Algorithm for EPON based on all ONU REPORT Messages | |
| Liu et al. | DGP: A DYNAMIC GROUP POLLING MAC PROTOCOL FOR ETHERNET PASSIVE OPTICAL NETWORKS | |
| Mukherjee | Optical Access Networks | |
| Nouroozifar et al. | A Novel Upstream Scheduling Algorithm for Quality of Service Provisioning in Ethernet Passive Optical Networks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051109 Termination date: 20091211 |